diff --git a/src/web/ext/CurlException.php b/src/web/ext/CurlException.php
new file mode 100644
index 0000000..70e69d7
--- /dev/null
+++ b/src/web/ext/CurlException.php
@@ -0,0 +1,22 @@
+<?php
+namespace nur\sery\web\ext;
+
+use nulib\UserException;
+use Throwable;
+
+class CurlException extends UserException {
+  function __construct($ch, ?string $message=null, $code=0, ?Throwable $previous=null) {
+    $user_message = $message;
+    if ($message === null) $message = "(unknown error)";
+    $tech_message = null;
+    if ($ch !== null) {
+      $parts = [];
+      $errno = curl_errno($ch);
+      if ($errno != 0) $parts[] = "errno: $errno";
+      $error = curl_error($ch);
+      if ($error != "") $parts[] = "error: $error";
+      if ($parts) $tech_message = implode(", ", $parts);
+    }
+    parent::__construct($user_message, $tech_message, $code, $previous);
+  }
+}
diff --git a/src/web/ext/curl.php b/src/web/ext/curl.php
new file mode 100644
index 0000000..ad92f10
--- /dev/null
+++ b/src/web/ext/curl.php
@@ -0,0 +1,59 @@
+<?php
+namespace nur\sery\web\ext;
+
+/**
+ * Class curl: wrapper pour curl
+ *
+ * nécessite l'extension ext-curl
+ */
+class curl {
+  private static function _generic(string $url, ?array $curlOptions=null, ?array &$headers=null): string {
+    $curlOptions[CURLOPT_URL] = $url;
+    if (!isset($curlOptions[CURLOPT_RETURNTRANSFER])) $curlOptions[CURLOPT_RETURNTRANSFER] = true;
+    $extractHeaders = isset($curlOptions[CURLOPT_HEADER]) && $curlOptions[CURLOPT_HEADER];
+    $ch = curl_init();
+    if ($ch === false) throw new CurlException(null, "init");
+    curl_setopt_array($ch, $curlOptions);
+    try {
+      $result = curl_exec($ch);
+      if ($result === false) throw new CurlException($ch);
+      if ($extractHeaders) {
+        $info = curl_getinfo($ch);
+        $headersSize = $info["header_size"];
+        $headers = substr($result, 0, $headersSize);
+        $headers = explode("\r\n", $headers);
+        $result = substr($result, $headersSize);
+      }
+      return strval($result);
+    } finally {
+      curl_close($ch);
+    }
+  }
+
+  static final function get(string $url, ?array $params=null, ?array $curlOptions=null, ?array &$headers=null): string {
+    if ($params !== null) {
+      $query = http_build_query($params);
+      if (strpos($url, "?") !== false) $url = "$url&$query";
+      else $url = "$url?$query";
+    }
+    return self::_generic($url, $curlOptions, $headers);
+  }
+
+  private static function _custom(string $method, string $url, ?array $params=null, ?array $curlOptions=null, ?array &$headers=null): string {
+    $curlOptions[CURLOPT_CUSTOMREQUEST] = $method;
+    if ($params !== null) $curlOptions[CURLOPT_POSTFIELDS] = http_build_query($params);
+    return self::_generic($url, $curlOptions, $headers);
+  }
+
+  static final function post(string $url, ?array $params=null, ?array $curlOptions=null, ?array &$headers=null): string {
+    return self::_custom("POST", $url, $params, $curlOptions, $headers);
+  }
+
+  static final function put(string $url, ?array $params=null, ?array $curlOptions=null, ?array &$headers=null): string {
+    return self::_custom("PUT", $url, $params, $curlOptions, $headers);
+  }
+
+  static final function delete(string $url, ?array $params=null, ?array $curlOptions=null, ?array &$headers=null): string {
+    return self::_custom("DELETE", $url, $params, $curlOptions, $headers);
+  }
+}